Pump.



H. W. HANCOCK.

PUMP.

APPLICATION FILED MAR. a1, 1913.

Patented. Sept. 1, 1914.

HARRY W. HANCOCK, OFCHARIIQTTE'MICHIGAN;

PUMP.

Specification of Letters Fatent.

Patentedfiept. 1,- 159314.;

, a li tion filed March 31, 191a,. SerialI\To. 7-57,807.

To all whom it may concern:

Be it knownlthat I, HARRY W. HANcooK,

a citizen of the United States, residing at Charlotte, in the county ofEaton and State of Michigan, have invented certain new and usefulImprovements 111 Pumps, of which the followingis a specification.

My invention. relates to improvements in pumps and contemplates moreparticularly an improved air pump for use on automobiles for the purposeof pumping air to any desired place as, for example, into the gasolenetank to force the gasolene therefrom.

The nature of the invention will be more fully understood from thefollowing description taken in connection .with the accompanyingdrawings in which,

Figure 1 is a longitudinal central sectional view through a pumpembodying the features of my invention. Fig. 2 is an elevation,

from the left side of Fig. 1 showing {parts broken away. Fig. 3 is anend view of the cylinder taken from the upper end of Figs.

1 and 2.

Tn the exemplary embodiment of my invention which I have shown in thedrawings. the pump cylinder comprises a cylinder proper 1, a cap 2threadedon and closing one of its ends, and a head 3 closing theopposite end thereof. Within the cylinder is slidably mounted a plunger4 having an operating stem or rod 5 which is slidably mounted in abearing opening 6 in the cap 2. Said rod has a handle 7 fixed upon itsouter or upper end.

In order to insure that a controlling valve, to be later described,'which is operable by the plunger, will always be in its open positionbefore the handle of the plunger can be drawnputwardly, I provide aninterlocking engagement between the rod 5 and'the cap, 2 which preventslongitudinal movement of the plunger unless it is rotated into theposition to open said controlling valve. This interlocking engagement-may be provided for in different ways, the exemplary form which-ll haveherein showncomprising-a pin 9 fixed in the rod 5, said pin beingmovable by rotation of said rod into register with a groove 8 in the capcommunicating with the bearing opening 6 for the plunger rod. Thisconstruction prevents withdrawal of the rod unless the pin 9 and groove8 are in register,

when the controlling valve above mentioned will always be, in its openposition. A lug 10, on the inner face of the cap 2,. provides twoopposite steps against which the pin 9 s arranged to abut whenthe rod ,5is rotated in opposite directions.

The head the present instance a :disk 11' which is" of less diameterthan the internal diameter of the cylinder, saiddisk bearing against ashoulder formedon the rod 5 by the reduced inner end of said rod. Aflexible member 12 es of leather, rubber, or other suitablematerial 1sfitted oversaid reduced end and. is arranged to lie against the disk11., A plurality of ports 13 are provided invthe member 12. Theperipheral portion 12 of the 7o member 12 is turned at an angle to thebody thereof and extends along and contacts the inner wallof thecylinder. A plurality of radial fingers 14 have at their ends bearingagainst the peripheral portion 12" '0f.the

member 12, said fingersbeing of spring ma terial such as sheet metal'andtending to hold the portion12 in tight contact with the cylinder;Between the fingers ld and the member 12 is a washer 15. The parts so11, 12, 14 and 15 are clamped together and against the shoulder on therod 5 by means of a member 16 threaded on the reduced end of sagd'rodand bearing against the fingers 14.-

bifurcated to receive the stem of a valve member to be presentlydescribed, and said member 16 has an annular groove 18 in which fitsonecoil ofa'compression spring 19, said spring-surrounding-thebifurcated end of the member 16.

The head 3 has a passage-way 20 extending therethrough transversely ofthe cylinder 1, the outer end of said passage-way being '95 enlarged andinternally screw threaded to receive a conducton-leading-to the tank orotherplace to which "the air is to be pumped. The inner end of thepassage-way 20 communicates with'a passage-Way 21 extending from theinner faceof the head to the outer face thereof. Within the passage-way21 is ashoulder 22 forming a .valve seat against which a ball valve23-isarranged-to seat. A screw the outer end ofthe passage-way 21, saidplunger having-astem 25 arranged to hold the ball 23 in proper position.A tapered opening 26 extends. centrally through the head 3 from t of theplunger 4 comprises in to pin 17 serves torigidlysecure said 85 member16 to the rod 5. The member 16 is plug Qtisthreadedinto and closes heinner to. the outer face .110

' thereof, and intersects right angles 32 and pin 33 fixed inpassage-way 20- to with a vent port 36 opening 26 to the exterior of'thehead.

the passage-way 20. In this opening 26 is rotatably fitted a valve plug27 having a stem 28 which the bifurcated end of the member 16 isarranged to embrace at times. The valve member 27 also has a stem 29 atits'opposite end, and surrounding this stem of the head 3 is a coiledspring 30, said spring hearing at one end against the washer 31 and atits opposite end against a washer When the pump is to be used upon anautomobile, it maybe provided with'lugs 37 having openings 38 therein toreceive fastening devices for securing the pump to a suitable support.

When the stop pin 9 lies at the inner side of the cap 2, the member 16and the valve stem 28 will necessarily be interlocked. The normalposition of the parts is clearly shown in Fig. 1 and in such position ofthe parts the port- 34 in the valve plug will extend transversely of thepassage-way 20, so that said passage-way will be closed. In this[position of' the valve plug the stop pin 9 will abut against the Whenthe stop pin of the lug 10 or next right-hand shoulder .to the word Shutin Fig. 3. "When it is desired to operate the pump, the operator turnsthe handle 7 ninety degrees to the left which will bring the stop-pin 9into register with the groove 8. The handle may now'be drawn away fromthe cylinder and the spring 19, which is under compression when the pin9 is at the inner side of the 'cap 2, will tend to force the plungeroutwardly to carry the pin out through the groove 8. In moving thehandle 7 to bring the pin 9 into register with the groove 8, the valveplug 27 will have been simultaneously rotated to bring the port 34 intoregister with the passage-way 20. 9 is at the outer side of the cap 2,the bifurcated member 16 will have been moved out of engagement with thestem 19 of the "alve plug, so that the handle 7 can be rotated freelywithout affecting the position of said plug. During the pumpingoperationthe spring 19 acts as a cushion to prevent shock to the parts at theinner end of the, plunger stroke. Said spring also serves to preventrattling of the parts when in their normal position.

As thezplunger t is drawn outwardly, air

29'at the outer sidecompressing )asses around the edge of the disk 11and through the ports 13 in the member 12 into the space between theplunger 4 and the head 3. In such outward movement of the plunger themember 12 moves away from the disk 11, so that the air can pass freelythrough the ports 13. When the opposite or movement 'of the plunger iscommenced, the member 12 will be forced tightly against the disk 11 sothat the ports 13 are closed by said disk. As the plunger is now movedtoward the head 3, the air will be forced past the check valve 23,through the ports 21, 20 and 34 and through the conduit to the tank orother place desired. In the outward movement of the plunger the pressureof the air in the tank holds the ball 23 tightly seated against thevalve seat 22.-

It will be noted that the stem 25 holds the ball at one side of the port20 so that the ball will always be in position to be closed by thepressure of the air in the tank. When sufficient air has been pumped,the operator may return the parts to their normal position, as shown in1 and above described. lln case it is desired to withdraw all or aportion of the air in the tank, this may be done by rotating the rod 5to the left a half revolution from the position shown in Fig. 1 when thestop pin 9 will abut against the left-hand shoulder of the lug 10 andpoint toward the word Vent in Fig. 3. This movement of the rod 5 willrotate the valve hundred eighty plug 27 through degrees and bringregistry sage-way interior of the tank. At the same time; one end of theport 34 will be moved into registry with the vent port 36 leading to theexterior of the head and the atmosphere. The air in the tank may nowescape through the passage-way 20 and ports 35, 34 and 36.

T have herein described the present embodiment of my invention inconsiderable particularity for the sake of clearness, but I would haveit understood that I do not thereby intend to limit the invention to theprecise construction disclosed. I aim to cover in the appended claimsall modifications falling within the scope of the invention.

I claim as my invention 1. In a hand pump, in combination, a cylone thevent port 35 into inder having a head at one end provide with an outletpassage extending transversely of the axis of the cylinder, a rotaryvalve plug extending across said passage and having a port arranged toregister with said passage, a plunger 1n said cylinder hav-.

ing a disengageable connection with said plug for rotating the latter,and means for preventing reciprocation of said plunger until said porthas been moved into register with said passage.

wlth the outer portion of the pas- 20 and in communication with the 2.In a hand'pump, in combination, a

cylinder hating a head at one end provided with an outlet passageextending trans 'register with said passage, a plunger slidable in saidcylinder and having a disengageable connection with said valve plug, a

' coiled compression spring mounted on the inner end of said plunger andarranged to engage said head, said spring tending to force said plungeroutwardly, a coiiperating pin and groove on the plunger stem and theopposite end of. the cylinder, the port .in,

said valve plug registering with said passage when said pin registerswith said groove, the pin preventing outward movement of the plungeruntil the pin registers with the groove.

8. in a pump, in combination, a cylinder having an outlet passage,'avalve plug crossing said passage and having a transverse portthe'rethrough adapted to register with said passage, said plug alsohaving a vent port leading substantially at right angles from the firstmentioned port to the surface of theplug, the cylinder havinga ventpassage adapted to register with said vent port in the plug, and ahand-operable plun= ger slidable in said cylinder and adapted to rotatesaid valve plug.

4. In a pump, in combination, a cylinder having an outlet passage andhaving a vent opening communicating with said passage, a valve memberarranged to control said passage and said vent opening, an outwardlyopening check valve controlling said passage between said valve -memberand the inner end of said passage, and a hand-operable plunger slidablein said cylinder and arranged to operate said valve.

5. In a pump, in combination, a cylinder having a head provided with atransverse outlet passage and having a vent opening communicatingwithsaid passage, a rotary operable plunger slidable in'said cylinder andarranged to rotate said valve plug.

6. A pump comprising a cylinder having a head at one end, said headhaving an outlet passage extending transversely of the axis of thecylinder, a plunger arranged to reciprocate in said cylinder, a rotaryvalve member positioned concentrically with said cylinder andcontrolling said passage, a disengageable connection between said valve.member and said plunger, and a handle for reciprocating said plungerand for rotating said valve member through the medium of saiddisengageable connection.

7. In a pump, in combination, a cylinder having a head closing one end,and a cap closing the opposite end, said head having an outlet passagetherein, a rotary valve member mounted in said head coaxial with saidcylinder, and a plunger having a disengageable connection with saidvalve memher for rotating the latter, said plunger having a rod slidablyextending through said cap, said rod having a 'projectionarranged to bemoved into register with a groove through said cap by rotation of saidrod to permit said projection to be moved to the outer side of said capby endwise movement of said rod, said valve member being in its openposition when said projection is in register with said groove.

' 8. In an air pump, in combination, a cylinder having an end-closingcap, and a plunger reciprocably mounted in said cylinder and comprisinga rod slidable through said cap, a rigid disk fixed on said rod, aflexible member mounted on said rod and having its peripheral portion intight contact with the interior of the cylinder, said disk being of lessdiameter than the cylinder, and said member having a port therethroughto permit the passage of air.

9. In an air compressing pump, in combi nation, a cylinder, a headclosing one end of said cylinder and having an outlet there'- in, a capclosing the other end of said cylinder, and a plunger reciprocablymounted in said cylinder and comprising a rod slidable through said cap,a rigid disk fixed on said rod, a flexible member mounted on said rodalongside said disk and having its peripheral portion turned to liealong the inner surface of the cylinder, and yielding means tending tohold said peripheral portion against the cylinder, said disk being ofless diameter than the cylinder, and said flexible member having a porttherethrough whereby air may pass around said disk and through said portwhen the plun eris moved vaway from said outlet, said fl exible memberbeing arranged to be forced against said disk to close said port whenthe plunger is moved toward said outlet,

10. lln a pump, in combination, a cylinder having a head closing one endthereof, said head having a passage extending from its inner to itsouter surface and having another passage communicating therewith andextending transversely of the axis of the cylinder, a check valvecontrolling the firstmentioned passage, a plug closing the outer end ofthe first-mentioned passage, a rotary valve plug mounted in the headcoaxial with the cylinder and having a transverse port therethrougharranged to register with the second-mentioned passage, and a pistonreciprocably mounted in said cylinder and having. a disengageableconnection withsaid valve plug whereby rotation of said piston the innerend of the passage, a check valve 4 of said plunger and the opposite endof said controlling the passage between said valve member and the innerend of the passa e, I and a hand-operable plunger in said cylin erarranged to operate the first mentioned valve member. 4

12. In an air pump, in combination, a cylinder having a dischargepassage in one end thereof, a rotarylvalve controlling said passage, aplunger slidable in said cylinder and arranged to rotate said valve,-and an interlocking engagement between the stem cylinder whereb drawnuntil sai valve has been opened.

13. In an air pump, in com'blnation, a cylinder having a dischargepassage in one end thereof, a rotary valve controlling said passage, aplunger slidable in said cylinder,

a disengageable interlocking connection be tween said plunger and saidvalvewhen the plunger is near said end of the cylinder, and aninterlocking connection between the stem of said plunger and theopposite end of said cylinder, whereby said plunger must be rotated'intoposition to open said valve before said stem can be drawn outwardly.

said stem cannot be with- In testimony whereof I afiix my signature inthe presence of two witnesses,

HARRY Witnesses:

- L. L. MEIER,

C PAUL PARKER.

